Business · Calculator companion · By K Imports
Overhead absorption rate: practical guide
This guide explains how to use the Count.ie overhead absorption rate. Allocate overhead by productive hours or units and estimate the burden for a job. Follow the inputs, method and worked example below, then compare your own scenario.
Guide written .
Open the Overhead absorption rate calculatorWhat to prepare
- Gather supplier quotes, invoices, time records and the actual scope of the job or business decision.
- Separate revenue from VAT, direct costs from overheads, and profit from the timing of cash receipts.
- Use the same accounting period and currency for related inputs.
Understand the inputs
The calculation method
Hourly overhead = annual overhead ÷ productive hours; unit overhead = annual overhead ÷ units produced.
Worked example
Illustrative inputs and their result.
Example inputs
- Annual overhead (€)
- 150000
- Annual productive hours
- 6000
- Annual units produced
- 25000
- Job productive hours
- 30
- Job units
- 100
Calculated example result
- Overhead Per Productive Hour
- €25.00
- Overhead Per Unit
- €6.00
How to interpret the result
A profitable estimate can still create a cash shortfall. Read the cost and timing assumptions as well as the headline profit, price or return; the result is a scenario, not a sales forecast.
Keep the scope constant while changing price, volume, supplier cost or time. A lower-sales or higher-cost case helps show whether the decision depends on an optimistic assumption.
Common mistakes to avoid
- Do not confuse markup on cost with margin on selling price.
- Include work that is easy to miss, such as travel, setup, rework and administration, where the model supports it.
- Do not treat tax collected or an unpaid invoice as freely available cash.
Assumptions and sources
Hour-based and unit-based allocations are alternatives, rather than costs to add together. Use achievable production capacity.
If your case falls outside this scope, use a more suitable calculator or contact us about an unclear method.